Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be549a53cd1562c…

MALICIOUS

PDF

85.4 KB Created: 2021-07-23 05:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cbe5b949de3d6d6699de6a1a62283a4b SHA-1: 770879ffc419f48e20dc1bac620ec175db672acd SHA-256: 0be549a53cd1562ca4eaa20bb66d989265cfdb0f190f937e797c8a453219061f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to potentially compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://rld-carbon.ru/file/89480989460.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16079a9e557b5f---76844774023.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/4e0psfd9p3k2u8efbqfvjo4v0i/fekiw.pdf
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/f51shgj3s71h7q4o36v63pqett/wisosuxipesananeve.pdf
    • https://local-atlas.ru/userfiles/files/69856465709.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088340c8d4b3---rilimezuveleliwuz.pdf
    • http://tycoonmedical.com/userfiles/file/daresidasoruxaleri.pdf
    • http://easternhoteljeju.com/FileData/ckfinder/files/20210616_EE0295AEC1D9E80C.pdf
    • http://magogaralbamoble.com/galeria/files/sekemuvumepoz.pdf
    • http://ventilatoryzlin.cz/images/file/76404322402.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a7ede20a3---56657534359.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/vsq6qhqusdq2lajkgia540iff9/pexusigugem.pdf
    • https://laser123.com/geektic/files/24460692964.pdf
    • http://music-summer-courses.eu/upload/files/41771975338.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160735e32e1df1---72861013536.pdf
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a531949c55f---teregepakimatopob.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4be5e774f---mufuruwigeronijuvewun.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/af86bbe46ac8bcf62588ff9c1971cea0/96721574500.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/e026042416ff5f821c7b5587e439d0a1/xokutonisifela.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082516cb9251---xusamaxuwulotupufapetola.pdf
    • http://osc-pribor.ru/products_pictures/file/50855456444.pdf
    • http://apcmagon.com/userfiles/ledud.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=jochebed+anointing+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eca6.bin
6c89c849a36e717c8920fb6ea27442a1e9bff5bf654110722c299580ee7acf62
pdf-font-stream PDF embedded font (sfnt) at offset 0xECA6 10716 bytes
font_01_sfnt_off000104bf.bin
83f29a232f5dd9b0be801c6a78139fac72af61078c9261bf414ca6635df5ccdd
pdf-font-stream PDF embedded font (sfnt) at offset 0x104BF 16752 bytes
font_02_sfnt_off00012fcc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCC 16792 bytes